The learner will demonstrate knowledge of GMAW equipment.
GMAW: Equipment
If you could adjust the slope (as you can on some machines), what effect would a too steep slope have?
-
The pinch effect will be applied rapidly and the molten drop will be violently "squeezed" off the electrode and cause excessive spatter.
-
The electrode will carry the full current, but the pinch effect may be too low to separate the drop and re-establish the arc. Under these conditions, the electrode will either pile up on the workpiece or freeze to the puddle.
-
The short circuit current will rise rapidly to a high level. The pinch effect will also be high and the molten drop will separate violently from the wire. The excessive pinch effect will abruptly squeeze the metal aside, clear the short circuit, and create excessive spatter.
Question 1 of 10
GMAW: Equipment
Correct!
If you could adjust the slope (as you can on some machines), what effect would a too steep slope have?
Correct Answer
The short circuit current will rise rapidly to a high level. The pinch effect will also be high and the molten drop will separate violently from the wire. The excessive pinch effect will abruptly squeeze the metal aside, clear the short circuit, and create excessive spatter.
Question 1 of 10
GMAW: Equipment
Incorrect
If you could adjust the slope (as you can on some machines), what effect would a too steep slope have?
Your Answer
Correct Answer
The short circuit current will rise rapidly to a high level. The pinch effect will also be high and the molten drop will separate violently from the wire. The excessive pinch effect will abruptly squeeze the metal aside, clear the short circuit, and create excessive spatter.
Question 1 of 10
GMAW: Equipment
Which drive roll is used for GMAW of welding with steel electrode wires?
Question 1 of 10
GMAW: Equipment
Correct!
Which drive roll is used for GMAW of welding with steel electrode wires?
Correct Answer
V-Groove rolls
Question 1 of 10
GMAW: Equipment
Incorrect
Which drive roll is used for GMAW of welding with steel electrode wires?
Your Answer
Correct Answer
V-Groove rolls
Question 1 of 10
GMAW: Equipment
A power source without inductance has what effect?
-
The pinch effect will be applied rapidly and the molten drop will be violently "squeezed" off the electrode and cause excessive spatter.
-
The electrode will carry the full current, but the pinch effect may be too low to separate the drop and re-establish the arc. Under these conditions, the electrode will either pile up on the workpiece or freeze to the puddle.
-
The short circuit current will rise rapidly to a high level. The pinch effect will also be high, and the molten drop will separate violently from the wire. The excessive pinch effect will abruptly squeeze the metal aside, clear the short circuit, and create excessive spatter.
Question 1 of 10
GMAW: Equipment
Correct!
A power source without inductance has what effect?
Correct Answer
The pinch effect will be applied rapidly and the molten drop will be violently "squeezed" off the electrode and cause excessive spatter.
Question 1 of 10
GMAW: Equipment
Incorrect
A power source without inductance has what effect?
Your Answer
Correct Answer
The pinch effect will be applied rapidly and the molten drop will be violently "squeezed" off the electrode and cause excessive spatter.
Question 1 of 10
GMAW: Equipment
Increased arc on time makes the puddle _________ and results in a flatter and smoother weld bead.
Question 1 of 10
GMAW: Equipment
Correct!
Increased arc on time makes the puddle _________ and results in a flatter and smoother weld bead.
Correct Answer
more fluid
Question 1 of 10
GMAW: Equipment
Incorrect
Increased arc on time makes the puddle _________ and results in a flatter and smoother weld bead.
Your Answer
Correct Answer
more fluid
Question 1 of 10
GMAW: Equipment
In spray transfer, the addition of some inductance to the power supply will produce a __________ without affecting the steady-state welding condition.
Question 1 of 10
GMAW: Equipment
Correct!
In spray transfer, the addition of some inductance to the power supply will produce a __________ without affecting the steady-state welding condition.
Correct Answer
softer arc
Question 1 of 10
GMAW: Equipment
Incorrect
In spray transfer, the addition of some inductance to the power supply will produce a __________ without affecting the steady-state welding condition.
Your Answer
Correct Answer
softer arc
Question 1 of 10
GMAW: Equipment
Increased arc on time makes the puddle more fluid and results in a _________ weld bead.
Question 1 of 10
GMAW: Equipment
Correct!
Increased arc on time makes the puddle more fluid and results in a _________ weld bead.
Correct Answer
flatter and smoother
Question 1 of 10
GMAW: Equipment
Incorrect
Increased arc on time makes the puddle more fluid and results in a _________ weld bead.
Your Answer
Correct Answer
flatter and smoother
Question 1 of 10
GMAW: Equipment
If you could adjust the slope (as you can on some machines), what effect does little or no slope have?
-
The short circuit current will rise rapidly to a high level. The pinch effect will also be high, and the molten drop will separate violently from the wire. The excessive pinch effect will abruptly squeeze the metal aside, clear the short circuit, and create excessive spatter.
-
The electrode will carry the full current, but the pinch effect may be too low to separate the drop and re-establish the arc. Under these conditions, the electrode will either pile up on the workpiece or freeze to the puddle.
-
The pinch effect will be applied rapidly and the molten drop will be violently "squeezed" off the electrode and cause excessive spatter.
Question 1 of 10
GMAW: Equipment
Correct!
If you could adjust the slope (as you can on some machines), what effect does little or no slope have?
Correct Answer
The electrode will carry the full current, but the pinch effect may be too low to separate the drop and re-establish the arc. Under these conditions, the electrode will either pile up on the workpiece or freeze to the puddle.
Question 1 of 10
GMAW: Equipment
Incorrect
If you could adjust the slope (as you can on some machines), what effect does little or no slope have?
Your Answer
Correct Answer
The electrode will carry the full current, but the pinch effect may be too low to separate the drop and re-establish the arc. Under these conditions, the electrode will either pile up on the workpiece or freeze to the puddle.
Question 1 of 10
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Question 1 of 10
- Author
- Published
- 4/15/2015
- Last Updated
- 4/15/2015
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GMAW: Equipment by Fox Valley Technical College is licensed under a Creative Commons Attribution 3.0 Unported License.